Noninvasive Estimation of Left Ventricular Filling Pressures

Assessment of Diastolic Function

“…The AR wave widens and its velocity increases. The ratio of the A and AR wave durations (Adur/ARdur) decreases with the LAP increase, becoming ≤1 when LAP exceeds 20 mm Hg [24,27]. The amplitude of the E′ wave remains decreased.…”

“…That of the A′ wave decreases with the loss of compliance of the left ventricle (Figure 8-7). The E/E′ ratio is an index of the LAP and tends to increase with LAP (see Chapter 9) [9,[27][28][29].…”